Point (Java Platform SE 6)
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Java™ PlatformStandard Ed. 6
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java.awt
Class Point
java.lang.Object
java.awt.geom.Point2D
java.awt.Point
All Implemented Interfaces: Serializable, Cloneable
public class Pointextends Point2Dimplements Serializable
A point representing a location in (x,y) coordinate space,
specified in integer precision.
Since:
1.0
See Also:Serialized Form
Nested Class Summary
Nested classes/interfaces inherited from class java.awt.geom.Point2D
Point2D.Double, Point2D.Float
Field Summary
int
x
The X coordinate of this Point.
int
y
The Y coordinate of this Point.
Constructor Summary
Point()
Constructs and initializes a point at the origin
(0, 0) of the coordinate space.
Point(int x,
int y)
Constructs and initializes a point at the specified
(x,y) location in the coordinate space.
Point(Point p)
Constructs and initializes a point with the same location as
the specified Point object.
Method Summary
boolean
equals(Object obj)
Determines whether or not two points are equal.
Point
getLocation()
Returns the location of this point.
double
getX()
Returns the X coordinate of this Point2D in
double precision.
double
getY()
Returns the Y coordinate of this Point2D in
double precision.
void
move(int x,
int y)
Moves this point to the specified location in the
(x,y) coordinate plane.
void
setLocation(double x,
double y)
Sets the location of this point to the specified double coordinates.
void
setLocation(int x,
int y)
Changes the point to have the specified location.
void
setLocation(Point p)
Sets the location of the point to the specified location.
String
toString()
Returns a string representation of this point and its location
in the (x,y) coordinate space.
void
translate(int dx,
int dy)
Translates this point, at location (x,y),
by dx along the x axis and dy
along the y axis so that it now represents the point
(x+dx,y+dy).
Methods inherited from class java.awt.geom.Point2D
clone, distance, distance, distance, distanceSq, distanceSq, distanceSq, hashCode, setLocation
Methods inherited from class java.lang.Object
finalize, getClass, notify, notifyAll, wait, wait, wait
Field Detail
x
public int x
The X coordinate of this Point.
If no X coordinate is set it will default to 0.
Since:
1.0
See Also:getLocation(),
move(int, int)
y
public int y
The Y coordinate of this Point.
If no Y coordinate is set it will default to 0.
Since:
1.0
See Also:getLocation(),
move(int, int)
Constructor Detail
Point
public Point()
Constructs and initializes a point at the origin
(0, 0) of the coordinate space.
Since:
1.1
Point
public Point(Point p)
Constructs and initializes a point with the same location as
the specified Point object.
Parameters:p - a pointSince:
1.1
Point
public Point(int x,
int y)
Constructs and initializes a point at the specified
(x,y) location in the coordinate space.
Parameters:x - the X coordinate of the newly constructed Pointy - the Y coordinate of the newly constructed PointSince:
1.0
Method Detail
getX
public double getX()
Returns the X coordinate of this Point2D in
double precision.
Specified by:getX in class Point2D
Returns:the X coordinate of this Point2D.Since:
1.2
getY
public double getY()
Returns the Y coordinate of this Point2D in
double precision.
Specified by:getY in class Point2D
Returns:the Y coordinate of this Point2D.Since:
1.2
getLocation
public Point getLocation()
Returns the location of this point.
This method is included for completeness, to parallel the
getLocation method of Component.
Returns:a copy of this point, at the same locationSince:
1.1
See Also:Component.getLocation(),
setLocation(java.awt.Point),
setLocation(int, int)
setLocation
public void setLocation(Point p)
Sets the location of the point to the specified location.
This method is included for completeness, to parallel the
setLocation method of Component.
Parameters:p - a point, the new location for this pointSince:
1.1
See Also:Component.setLocation(java.awt.Point),
getLocation()
setLocation
public void setLocation(int x,
int y)
Changes the point to have the specified location.
This method is included for completeness, to parallel the
setLocation method of Component.
Its behavior is identical with move(int, int).
Parameters:x - the X coordinate of the new locationy - the Y coordinate of the new locationSince:
1.1
See Also:Component.setLocation(int, int),
getLocation(),
move(int, int)
setLocation
public void setLocation(double x,
double y)
Sets the location of this point to the specified double coordinates.
The double values will be rounded to integer values.
Any number smaller than Integer.MIN_VALUE
will be reset to MIN_VALUE, and any number
larger than Integer.MAX_VALUE will be
reset to MAX_VALUE.
Specified by:setLocation in class Point2D
Parameters:x - the X coordinate of the new locationy - the Y coordinate of the new locationSee Also:getLocation()
move
public void move(int x,
int y)
Moves this point to the specified location in the
(x,y) coordinate plane. This method
is identical with setLocation(int, int).
Parameters:x - the X coordinate of the new locationy - the Y coordinate of the new locationSee Also:Component.setLocation(int, int)
translate
public void translate(int dx,
int dy)
Translates this point, at location (x,y),
by dx along the x axis and dy
along the y axis so that it now represents the point
(x+dx,y+dy).
Parameters:dx - the distance to move this point
along the X axisdy - the distance to move this point
along the Y axis
equals
public boolean equals(Object obj)
Determines whether or not two points are equal. Two instances of
Point2D are equal if the values of their
x and y member fields, representing
their position in the coordinate space, are the same.
Overrides:equals in class Point2D
Parameters:obj - an object to be compared with this Point2D
Returns:true if the object to be compared is
an instance of Point2D and has
the same values; false otherwise.See Also:Object.hashCode(),
Hashtable
toString
public String toString()
Returns a string representation of this point and its location
in the (x,y) coordinate space. This method is
intended to be used only for debugging purposes, and the content
and format of the returned string may vary between implementations.
The returned string may be empty but may not be null.
Overrides:toString in class Object
Returns:a string representation of this point
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Submit a bug or featureFor further API reference and developer documentation, see Java SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples. Copyright 2009 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.
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